Communication system, and interrogator and transponder of...

Details Communication system, and interrogator and transponder of... Communication system, and interrogator and transponder of...

2005-06-10

2010-10-12

Zimmerman, Brian A (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010100, C342S042000

Reexamination Certificate

active

07812707

ABSTRACT:
A communication system including: (a) a plurality of interrogators; and (b) at least one transponder operable, upon reception of an interrogating wave transmitted from each of the interrogators, to respond to the interrogator with a reflected wave which is generated by modulating the interrogating wave. Each of the interrogators is operable to communicate with the other of the interrogators in a wireless manner. A frequency band of the reflected wave transmitted from the transponder to each of the interrogators is preferably separated from a frequency band of a communication wave transmitted from the interrogator to the other of the interrogators, and is preferably closer to a frequency of the interrogating wave transmitted from the interrogator to the transponder, than the frequency band of the communication wave.

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